KR20220068433A - transparent film with enhanced durabilit - Google Patents

Abstract

Disclosed is a transparent film with enhanced durability. The transparent film with enhanced durability of the present invention comprises: a substrate layer; a first inorganic material layer laminated on one side of the substrate layer; a metal layer laminated on one surface of the first inorganic material layer; a second inorganic material layer laminated on one surface of the metal layer; and a plurality of organic material layers laminated on one surface of the second inorganic material layer.

Description

Durability enhanced transparent film {transparent film with enhanced durabilit}

The present invention relates to a transparent film with enhanced durability.

Recently, many high-resolution display products of 8K or higher, including LED TVs, have been released. However, as the resolution increases, the density of pixels in a single area increases. As the density of pixels increases, the number of TFTs also increases and heat is generated naturally.

LED TV generates a lot of heat not only from TFT but also from the LED itself, which generates more heat and electromagnetic waves than LCD/OLED.

In the case of the conventional ITO electrode, it is widely used as an electrode material having excellent electrical conductivity and high light transmittance. However, the thermal barrier properties and electromagnetic wave shielding performance are remarkably deteriorated to a level that cannot be used.

Although silver nanowire (AgNW) has high transparency, it has a chronic problem in that it cannot overcome the problems of heat blocking ability and reliability.

Numerous studies on silver (Ag) or silver alloys have been conducted, but there has been no solution that has secured the stability of silver so far.

Nevertheless, silver has superior electromagnetic and heat shielding and blocking properties than any other material, so research to secure the durability of silver is continuing.

In particular, considering that the Ag layer formed as a thin film has much lower stability than a thick film, securing the stability of the silver thin film is an important technical task.

On the other hand, a plastic film used as a display substrate has inferior light transmission properties compared to a glass substrate. Therefore, it is not an easy task to improve optical properties with a plastic substrate, and it is important to increase the transmittance even as fine as possible.

Therefore, the anti-reflection effect must be applied to the film and the gas permeation barrier effect must be realized at the same time. The permeability to oxygen or moisture is sometimes explained by the pinhole model. For this reason, the multi-layer structure has a remarkable effect in preventing the penetration of oxygen, moisture, etc. due to separation in terms of the distance of the pinholes between layers.

However, there was a limitation that the inorganic protective layer alone could not completely prevent the penetration of moisture and gas.

The technical problem to be solved by the present invention is to prevent oxidation of the silver thin film layer to secure durability, and to provide a transparent film with enhanced durability that can simultaneously implement heat blocking and electromagnetic blocking.

In order to solve the above technical problem, a transparent film with enhanced durability according to an embodiment of the present invention includes a base layer; a first inorganic material layer laminated on one surface of the base layer; a metal layer laminated on one surface of the first inorganic material layer; a second inorganic material layer laminated on one surface of the metal layer; and a plurality of organic material layers stacked on one surface of the second inorganic material layer.

In one embodiment of the present invention, a hard coating layer disposed on both sides of the base layer, respectively; may further include.

In one embodiment of the present invention, a refractive index matching layer that is respectively disposed between the base layer and the first inorganic material layer and between the second inorganic material layer and the passivation layer to reinforce the refractive index; may further include.

In one embodiment of the present invention, the passivation layer, a first passivation layer comprising a first organic material; a second passivation layer including a second organic material different from the first organic material; a third passivation layer including a third organic material different from the first and second organic materials; and a fourth passivation layer including a fourth organic material different from the first, second, and third organic materials.

In an embodiment of the present invention, the metal layer may include silver (Ag), and the first inorganic material layer and the second inorganic material layer may include copper oxide (CuOx).

In an embodiment of the present invention, the metal layer may include silver (Ag), and the first inorganic material layer and the second inorganic material layer may include copper nitride (CuNx).

The present invention has an effect of preventing oxidation of the silver thin film layer by compounding the organic and inorganic layers into multiple layers.

The present invention has the effect of being able to provide a durable transparent film in which the durability of the silver thin film layer is strengthened and thus high heat blocking and electromagnetic blocking performance are realized.

1 shows a transparent film with enhanced durability according to an embodiment of the present invention.
2 is an experimental result of measuring transmittance according to wavelength of a transparent film with enhanced durability according to an embodiment of the present invention.
3 is a photograph comparing before and after the reliability test of Comparative Example 1.
4 is a photograph comparing before and after the reliability test of Comparative Example 2.
5 is a photograph comparing before and after a reliability test of an embodiment of the present invention.
6 shows the measurement results of moisture permeability over time of the durable transparent film according to an embodiment of the present invention.
7 shows the level of radio interference noise according to the frequency of the durable transparent film according to the embodiment of the present invention.
8 is an infrared photograph for evaluating the heat shielding performance of the transparent film with enhanced durability according to the embodiment of the present invention and the comparative examples.

Since the present invention can apply various transformations and can have various embodiments, specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 shows a transparent film 100 with enhanced durability according to an embodiment of the present invention.

Referring to FIG. 1 , the transparent film 100 with enhanced durability according to an embodiment of the present invention has a first hard coating layer 110 , a base layer 120 , a second hard coating layer 130 , and a first refractive index matching. Layer 140, first inorganic material layer 150, metal layer 160, second inorganic material layer 170, second refractive index matching layer 180, first passivation layer 192, second passivation layer 194 , a third passivation layer 196 and a fourth passivation layer 198 .

The first hard coating layer 110 and the second hard coating layer 130 are transparent films of high hardness and may be provided to secure transmittance and strength. The first hard coating layer 110 and the second hard coating layer 130 may be used for refractive index matching with other substrates while ensuring high hardness and wear resistance characteristics. In addition, the second hard coating layer 130 also improves interlayer adhesion when the inorganic layer is deposited thereon.

The refractive index of the first hard coating layer 110 and the second hard coating layer 130 is preferably selected to be relatively low.

The first hard coating layer 110 and the second hard coating layer 130 are a bar coating method, a knife coating method, a roll coating method, a blade coating method, a die coating method, a micro gravure coating method, a comma coating method, a slot die coating method, It may be manufactured by a lip coating method or a method for manufacturing a hard coating film performed by a solution casting method.

A base layer 120 may be stacked on the first hard coating layer 110 , and a second hard coating layer 130 may be stacked on the base layer 120 again.

The substrate layer 120 may include an inorganic material or an organic material. The inorganic material may be any one or a combination of glass, quartz, Al2O3, SiC, Si, GaAs, and InP, but is not limited thereto. Organic material is Kepton foil, polyimide (PI), polyethersulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethylene naphthalate (PEN) , polyethyleneterephthalate (PET), polyphenylene sulfide (PPS), polyarylate (polyarylate), polycarbonate (PC), cellulose triacetate (CTA), cellulose acetate propio It may be selected from nate (cellulose acetate propionate, CAP), but is not limited thereto.

In an embodiment of the present invention, the base layer 120 may be made of polyethylene terephthalate (PET) used for optics.

Since the base layer 120 is prone to curvature due to the thickness of the passivation layers 192, 194, 196, and 198 to be composed of an organic material, it may be preferable to form a thickness of at least 100 μm.

The second hard coating layer 130 may be laminated on the base layer 120 .

The first refractive index matching layer 140 may be laminated on the second hard coating layer 130 .

The first refractive index matching layer 140 may include an insulating material that is different from the refractive index of the layers stacked thereon.

For the first refractive index matching layer 140 , it is preferable to use a material having a large refractive index of 2.0 or more. As a ceramic material used for refractive index matching, TiOx, Nb2Ox, or the like is used. The first refractive index matching layer 140 may include a metal oxide, and the metal oxide may include any type of metal oxide having an amphiphilic property. For example, titanium sub-oxide (TiOx and Titanium oxide, TiO2), zinc oxide (Zinc oxide, ZnO), tungsten oxide (Tungsten oxide, W2O3, WO2, WO3), molybdenum oxide (MoO2, MoO2, and at least one selected from MoO3 and Molybdenum sub-oxide (MoOX) and combinations thereof.

The first refractive index matching layer 140 is preferably zinc oxide (Zinc oxide, ZnO) may be included.

The first inorganic material layer 150 may be stacked on the first refractive index matching layer 140 . A metal layer 160 may be stacked on the first inorganic material layer 150 , and the second inorganic material layer 170 may be stacked on the other surface of the metal layer 160 . With this structure, the metal layer 160 may be surrounded by two inorganic material layers.

For transparent films containing silver (Ag) as a metal layer, during the reliability test, the silver (Ag) element diffuses to the interface to self-generate a new diffusion barrier, or the specific resistance due to the remaining alloying elements in the silver (Ag) thin film increases. Measures were needed to prevent this.

The first inorganic material layer 150 and the second inorganic material layer 170 are configured to function as a thermally or chemically stable diffusion barrier layer. In order to function as a diffusion barrier of silver (Ag), the first inorganic material layer 150 and the second inorganic material layer 170 include transition metals such as Cu and Ti having low mutual solubility with silver (Ag). may be desirable.

The first inorganic material layer 150 and the second inorganic material layer 170 may be formed of a CuNx or SiNx thin film deposited using sputtering. Here, x is used to mean that there is no fixed or known amount of nitrogen. This is because even if nitrogen is supplied to the metal when manufacturing the metal nitride, the exact bonding ratio cannot be known.

The passivation characteristics of the first inorganic material layer 150 and the second inorganic material layer 170 are improved as the deposition thickness thereof increases. The SiNx thin film formed by the dry oxidation method exhibited about 20 times or more excellent passivation characteristics because it had a denser interfacial structure than that formed by the wet oxidation method.

[Table 1] compares the performances according to the materials of the first inorganic material layer 150 and the second inorganic material layer 170 .

rescue measurement mode L* a* b* Y 550nm sheet resistance
(Ω/sq) CuOx/Ag/CuOx penetration 93.98 -0.84 1.36 85.22 85.24 10.94 reflect 25.74 -0.95 -4.68 4.66 4.82 CuNx/Ag/CuNx penetration 93.16 -1.16 0.7 83.33 83.58 11.66 reflect 24.6 1.68 -2.3 4.29 4.34

In [Table 1], a* and b* are coordinates defined in CIE (International Commission on Illumination) LAB color space, a* is the degree of red and green, b* is yellow and Indicates the degree of blue. Y represents luminance, L* represents brightness, and transmittance was measured at 550 nm.

In the present invention, copper oxide and copper nitride were compared and analyzed. As a result, copper oxide was advantageous in terms of increase in transmittance, but it was found that nitride was excellent in passivation characteristics.

The first inorganic material layer 150 and the second inorganic material layer 170 may be formed in a range of 5 nm to 10 nm in consideration of transmittance.

As a metal forming the metal layer 160 , the metal layer 160 may include a conductive material such as APC, Cu, Cu alloy, Ag, Ag alloy, Mo/Ag, or Mo/APC.

Preferably, in an embodiment of the present invention, the metal layer 160 may include silver (Ag).

As the thickness of the metal layer 160 increases, the transmittance of the metal layer 160 decreases due to absorption or scattering when the multilayer thin film is formed.

The second refractive index matching layer 180 may be stacked on the second inorganic material layer 170 .

The material for the second refractive index matching layer 180 may be a material having a refractive index different from that of the first refractive index matching layer 140 .

The second refractive index matching layer 180 is preferably made of a material having a large refractive index of 2.0 or more. As a ceramic material used for the second refractive index matching layer 180 , TiOx, Nb2Ox, or the like is used. The second refractive index matching layer 180 may include a metal oxide, and the metal oxide may include any type of metal oxide having an amphiphilic property. For example, titanium sub-oxide (TiOx and Titanium oxide, TiO2), zinc oxide (Zinc oxide, ZnO), tungsten oxide (Tungsten oxide, W2O3, WO2, WO3), molybdenum oxide (MoO2, MoO2, and at least one selected from MoO3 and Molybdenum sub-oxide (MoOX) and combinations thereof. Preferably, the second refractive index matching layer 180 is zinc oxide (Zinc oxide, ZnO) may be included.

The first passivation layer 192 may be stacked on the second refractive index matching layer 180 .

The first passivation layer 192 may include a first organic material. The first passivation layer 192 may complement the other laminated thin films to prevent oxidation of the metal layer 160 , that is, the silver thin film, thereby strengthening the durability of the transparent heat shielding film.

The first passivation layer 192 may be formed of a material having an adhesive force and a refractive index different from that of the second refractive index matching layer 180 . The first passivation layer 192 may be formed of a polymer having a lower refractive index than that of the second refractive index matching layer 180 , and may be formed of a material having a refractive index of 1.5.

The first passivation layer 192 is, polyvinylpyrrolidone (Polyvinylpyrrolidone, PVP), polycarbonate (Polycarbonate, PC), polymethyl methacrylate (Poly (methyl methacrylate), PMMA), polystyrene (Polystyrene, PS), poly It may be formed of any one selected from among vinyl alcohol (Polyvinyl alcohol, PVA) and cellulose (Cellulose).

The first passivation layer 192 may be formed to a thickness of 30 nm to 300 nm using a solution process. If the first passivation layer 192 is formed to be less than 30 nm, there may be difficulties during solution coating, and if it is formed to be more than 300 nm, it may be difficult to attach to the refractive index matching layer. In addition, if it is out of the corresponding range, the transmittance may be lowered.

The second passivation layer 194 may be stacked on the first passivation layer 192 .

The second passivation layer 194 may include a second organic material. The second passivation layer 194 may complement the other laminated thin films to prevent oxidation of the metal layer 160 , that is, the silver thin film, thereby enhancing the durability of the transparent heat shielding film.

The second passivation layer 194 may be formed of a material having an adhesive force and a refractive index different from that of the first passivation layer 192 .

The second passivation layer 194 may be formed of a material having a refractive index of 1.55.

The second passivation layer 194 may be formed by including a polymer selected from any one group of urethane acrylate-based, silicone acrylate-based, and epoxy acrylate-based polymers.

The second passivation layer 194 is preferably a polymer that can be cured. The second passivation layer 194 may also be formed by applying an additive such as a resin additive or an inorganic filler to improve performance. These additives may serve to increase the spreadability or to adjust the refractive index to a desired degree.

The second passivation layer 194 may be formed to a thickness of 50 nm to 300 nm using a solution process. In addition, when it is out of the corresponding range, the transmittance may be lowered.

The third passivation layer 196 may be stacked on the second passivation layer 194 .

The third passivation layer 196 may include a third organic material. The third passivation layer 196 may complement the other laminated thin films to prevent oxidation of the metal layer 160 , that is, the silver thin film, thereby strengthening the durability of the transparent heat shielding film.

The third passivation layer 196 may be formed of a material having an adhesive force and a refractive index different from that of the second passivation layer 194 . The third passivation layer 196 may be formed of a polymer having a lower refractive index than that of the second passivation layer 194 , and may be formed of a material having a refractive index of 1.5.

The third passivation layer 196 is, polyvinylpyrrolidone (Polyvinylpyrrolidone, PVP), polycarbonate (Polycarbonate, PC), polymethyl methacrylate (Poly (methyl methacrylate), PMMA), polystyrene (Polystyrene, PS), poly It may be formed of any one selected from among vinyl alcohol (Polyvinyl alcohol, PVA) and cellulose (Cellulose).

The third passivation layer 196 may be formed to a thickness of 30 nm to 300 nm using a solution process.

The fourth passivation layer 198 may be stacked on the third passivation layer 196 .

The fourth passivation layer 198 may include a fourth organic material. The fourth passivation layer 198 may complement the other laminated thin films to prevent oxidation of the metal layer 160 , that is, the silver thin film, thereby strengthening the durability of the transparent heat shielding film.

The fourth passivation layer 198 may be formed of a material having an adhesive force and a refractive index different from that of the third passivation layer 196 .

The fourth passivation layer 198 may be formed of a material having a refractive index of 1.55.

The fourth passivation layer 198 may be formed by including a polymer selected from any one group of urethane acrylate-based, silicone acrylate-based, and epoxy acrylate-based polymers.

The fourth passivation layer 198 is preferably a polymer that can be cured. The fourth passivation layer 198 may also be formed by applying an additive such as a resin additive or an inorganic filler to improve performance.

The fourth passivation layer 198 may be formed to a thickness of 500 nm to 4 μm using a solution process.

Hereinafter, experiments and results of the transparent film according to an embodiment of the present invention and the transparent film in a comparative example will be described.

In an embodiment of the present invention, the transparent film includes a first hard coating layer 110 , a base layer 120 , a second hard coating layer 130 , a first refractive index matching layer 140 , a first inorganic material layer 150 , and a metal layer. (160), the second inorganic material layer 170, the second refractive index matching layer 180, the first passivation layer 192, the second passivation layer 194, the third passivation layer 196 and the fourth passivation layer ( 198) is composed.

In an embodiment of the present invention, the first hard coating layer 110 and the second hard coating layer 130 were formed to a thickness of 3 μm, and the base layer 120 was formed to a thickness of 100 μm using PET. The first refractive index matching layer 140 was formed of Nb2O5 to a thickness of 35 nm, the first inorganic material layer 150 and the second inorganic material layer 170 were formed to a thickness of 5 nm with CuNx, and the metal layer 160 was formed of silver (Ag). was formed to a thickness of 10 nm. The second refractive index matching layer 180 was formed of Nb2O5 to a thickness of 35 nm, the first passivation layer 192 was formed to a thickness of 100 nm with PMMA, and the second passivation layer 194 was formed to a thickness of 180 nm with epoxy acrylate, , the third passivation layer 196 was formed of PMMA with a thickness of 80 nm, and the fourth passivation layer 198 was formed with a thickness of 1.5 μm with urethane acrylate.

In Comparative Example 1, the transparent film was composed of a first hard coating layer, a base layer, a second hard coating layer, a refractive index matching layer, and a metal layer.

In Comparative Example 1, the first hard coating layer and the second hard coating layer were formed to a thickness of 3 μm, and the base layer was formed to a thickness of 100 μm using PET. The first refractive index matching layer was formed of Nb2O5 to a thickness of 35 nm, and the metal layer was formed of silver (Ag) to a thickness of 10 nm.

In Comparative Example 2, the transparent film consists of a first hard coating layer, a base layer, a second hard coating layer, a refractive index matching layer, a first inorganic material layer, a metal layer, a second inorganic material layer, and a second refractive index matching layer.

In Comparative Example 2, the first hard coating layer and the second hard coating layer were formed to a thickness of 3 μm, and the base layer was formed to a thickness of 100 μm using PET. The first refractive index matching layer was formed of Nb2O5 to a thickness of 35 nm, the first inorganic material layer and the second inorganic material layer were formed to a thickness of 5 nm with CuNx, the metal layer was formed of silver (Ag) to a thickness of 10 nm, and the second refractive index matching layer Silver was formed with Nb2O5 to a thickness of 35 nm.

In Comparative Example 1, compared to the embodiment of the present invention, the condition that neither the inorganic layer nor the organic layer for protecting the metal layer exists, and the conditions (material and thickness) of other components are the same.

Comparative Example 2 constitutes only an inorganic layer for protecting the metal layer and does not constitute an organic layer, and the conditions (material and thickness) of other components are the same as compared to an embodiment of the present invention.

[Table 2] shows the luminance Y and transmittance at a wavelength of 550 nm.

evaluation item Comparative Example 1 Comparative Example 2 embodiment of the present invention transmittance Y 65.4 77.3 88.1 @ 550 nm 76.9 77.6 88.4

Here, Y is the average transmittance, and @ 550 nm means transmittance at a wavelength of 550 nm.

The transmittance according to wavelength in the visible ray region is the same as in FIG. 2 . In Comparative Example 1, the transmittance was lower as the wavelength increased, and in Comparative Example 2, the transmittance was relatively high as it approached the infrared ray.

On the other hand, the Examples of the present invention showed high transmittance over the entire visible ray region, which was superior to those of Comparative Examples in terms of transmittance.

[Table 3] compares the before and after performances of Examples of the present invention and Comparative Examples 1 and 2 under high temperature and high humidity conditions, respectively.

The experiment was conducted to measure the optical properties before and after 3,000 hours had elapsed under a temperature of 60 °C and a humidity of 90% (R.H).

evaluation item Comparative Example 1 Comparative Example 2 embodiment of the present invention I'm after I'm after I'm after transmittance Y 65.4 72.7 77.6 78.6 88.1 88.4 @ 550 nm 65.6 73.2 77.6 79.5 87.2 89.4

As a result of the experiment, the transmittance was significantly higher in Examples of the present invention compared to Comparative Examples 1 and 2.

3A is a photograph before the experiment of Comparative Example 1, and FIG. 3B is a photograph after the experiment of Comparative Example 1.

4A is a photograph before the experiment of Comparative Example 2, and FIG. 4B is a photograph after the experiment of Comparative Example 2.

5A is a photograph before the experiment of the embodiment of the present invention, and FIG. 5B is a photograph after the experiment of the embodiment of the present invention.

On the other hand, Figures 4b and 5b are taken after applying a blackboard to the back in order to more clearly confirm the change in appearance.

In the case of Comparative Example 1, the film color changed within 24 hours, and the change in transmittance as well as the appearance change was large, indicating that the performance change before and after the reliability test was large.

In the case of Comparative Example 2, although reliability was somewhat improved by the function of the inorganic material layer, a change in appearance was observed.

In contrast, in the embodiment of the present invention, it can be seen that the transmittance and color change hardly occurred, so that the reliability was greatly improved compared to the comparative examples.

The water vapor transmission rate of the transparent film according to the embodiment of the present invention was measured, and the water vapor transmission rate (WVTR, Water Vapor Transmission Rate) with the transparent film of Comparative Example 1 was compared. Moisture has the greatest influence on the oxidation of the metal layer. Comparing the difference in the degree of passing of water vapor can be a measure of reliability.

Comparative Example 1 embodiment of the present invention Water vapor permeability (mg/m2·day) 5200 210

[Table 4] compares the moisture permeability of Examples and Comparative Example 1 of the present invention.

As a result of the experiment on the moisture permeability, the moisture permeability in Comparative Example 1 was 5200 mg/m2·day, and the water vapor transmission rate in the Example of the present invention was measured to be 210 mg/m2·day, so that the Example of the present invention had a higher water vapor transmission rate compared to Comparative Example 1. It was found that it was reduced to 1/25 level.

As a result, according to the transparent film of the embodiment of the present invention, there is an effect of lowering the moisture permeability, thereby improving the reliability under high temperature and high humidity conditions.

The measurement result of moisture permeability according to time is shown in FIG. 6 .

Shielding performance against electromagnetic interference (EMI) of the transparent film according to an embodiment of the present invention was measured.

The test measured the shielding performance in dB in the frequency range of 30 MHz - 1000 MHz.

As a result of the experiment, it was found that the electromagnetic wave was reduced by about 30 dB in the embodiment of the present invention. This is about 10dB lower than the ITO film.

The level of jamming noise according to frequency is shown in FIG. 7 .

Finally, the heat shielding performance of the transparent film according to the embodiment of the present invention was evaluated. Examples of the present invention were compared with ITO (Indium Tin Oxide) film and silver nanowire (AgNWs) film, respectively.

In Comparative Example 3, the transparent film was composed of a first hard coating layer, a base layer, a second hard coating layer, a refractive index matching layer, and an ITO layer.

In Comparative Example 4, the transparent film was composed of a first hard coating layer, a base layer, a second hard coating layer, a refractive index matching layer, and a silver nanowire layer.

After preparing a heat source at 70° C., the heat shielding experiment was conducted in such a way that one side of the transparent film and the heat source in each example were facing each other, and infrared (IR) was placed on the other side to measure the temperature.

The transparent film of the embodiment of the present invention had a temperature of 35.4° C. on the other side, so it was found that the heat shielding performance was very excellent.

In contrast, the transparent film in Comparative Example 3 had a temperature of 69.6° C. on the other side, and the change was insignificant, and the transparent film in Comparative Example 4 had a temperature of 65.5° C. It was found to be insignificant compared to the examples of the invention.

Figure 8a is an infrared photograph for evaluating the heat shielding performance of the transparent film of the embodiment of the present invention.

Figure 8b is an infrared photograph for evaluating the heat shielding performance of the transparent film of Comparative Example 3.

Figure 8c is an infrared photograph for evaluating the heat shielding performance of the transparent film of Comparative Example 4.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It is to be understood that this does not preclude the possibility of addition or existence of numbers, steps, operations, components, parts, or combinations thereof.

100: transparent film with enhanced durability
110: first hard coating layer
120: base layer
130: second hard coating layer
140: first refractive index matching layer
150: first inorganic material layer
160: metal layer
170: second inorganic material layer
180: second refractive index matching layer
192: first passivation layer
194: second passivation layer
196: third passivation layer
198: fourth passivation layer

Claims (6)

base layer;
a first inorganic material layer laminated on one surface of the base layer;
a metal layer laminated on one surface of the first inorganic material layer;
a second inorganic material layer laminated on one surface of the metal layer; and
A transparent film with enhanced durability, comprising a; a passivation layer comprising a plurality of organic material layers laminated on one surface of the second inorganic material layer.
The method of claim 1,
A transparent film with enhanced durability, characterized in that it further comprises; a hard coating layer disposed on both sides of the base layer, respectively.
According to claim 1,
A transparent film with enhanced durability, characterized in that it further comprises; a refractive index matching layer disposed between the base layer and the first inorganic material layer and between the second inorganic material layer and the passivation layer, respectively, to reinforce the refractive index.
According to claim 1,
The passivation layer,
a first passivation layer including a first organic material;
a second passivation layer including a second organic material;
a third passivation layer including a third organic material; and
A transparent film with enhanced durability comprising a; a fourth passivation layer comprising a fourth organic material.
According to claim 1,
The metal layer contains silver (Ag),
The first inorganic material layer and the second inorganic material layer is a transparent film with enhanced durability, characterized in that it contains copper oxide (CuOx).
According to claim 1,
The metal layer contains silver (Ag),
The first inorganic material layer and the second inorganic material layer is a transparent film with enhanced durability, characterized in that it contains copper nitride (CuNx).

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